EP 0176657 B1 19890726 - MUFFLER FOR EXHAUST GAS FROM INTERNAL COMBUSTION ENGINE
Title (en)
MUFFLER FOR EXHAUST GAS FROM INTERNAL COMBUSTION ENGINE
Publication
Application
Priority
JP 19824284 A 19840920
Abstract (en)
[origin: JPS6176714A] PURPOSE:To establish wide range of silencing performance by providing an expansion chamber in an exhaust silencer and an insertion tube and cylindrical sound absorptive substance in the expansion chamber to constitute an exhaust gas flow passage. CONSTITUTION:Expansion chambers 16-18 are formed by dividing the interior of the casing 2 of an exhaust silencer by partitions 11, 12 and there are provided an insertion tube 13 passing through the expansion chambers 16, 17 and a cylindrical sound absorptive substance 15 passing through the expansion chambers 17, 18. The cylindrical sound absorptive substance 15 includes a perforated tube 3, a metallic porous substance 7 provided concentrically with the perforated tube 3 and a thin film 9 interposed between the porous substance 7 and perforated tube 3. And also, a balance hole 10 for pressure regulation use is provided by cutting a part of the exhaust gas flow side of the metallic porous substance 7 and thin film 9. Thereby, silencing performance of low frequency band can be improved and the wide range of silencing performance also be established.
IPC 1-7
IPC 8 full level
F01N 1/10 (2006.01); F01N 1/00 (2006.01); F01N 1/02 (2006.01); F01N 1/24 (2006.01); F01N 13/16 (2010.01)
CPC (source: EP KR US)
F01N 1/00 (2013.01 - KR); F01N 1/006 (2013.01 - EP US); F01N 1/04 (2013.01 - EP US); F01N 1/24 (2013.01 - EP US); F01N 2490/155 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
EP 0176657 A1 19860409; EP 0176657 B1 19890726; CA 1238583 A 19880628; DE 3571854 D1 19890831; JP H0250289 B2 19901101; JP S6176714 A 19860419; KR 860002637 A 19860428; KR 890001409 B1 19890502; MX 162598 A 19910527; US 4610329 A 19860909; US 4700805 A 19871020
DOCDB simple family (application)
EP 85103960 A 19850402; CA 478451 A 19850404; DE 3571854 T 19850402; JP 19824284 A 19840920; KR 850001763 A 19850319; MX 20484485 A 19850403; US 72399085 A 19850416; US 72399085 D 19850416